Cambered-bar preacher curls: 4 sets of 10-12 reps
Seated alternate dumbbell curls: 4 sets of 10-12 reps
Concentration curls: 4 sets of 10-12 reps
* Sideways one-arm dumbbell preacher curls: 4 sets of 10-12 reps
Reverse cambered-bar preacher curls: 4 sets of 10-12 reps
* about Sideways preacher curls, read below: